Chert and Greywacke Types and Facts

Chert

Greywacke

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Types

Features

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Flint, Jasper, Radiolarite, Common Chert, Chalcedony, Agate, Onyx, Opal, Magadi-type Chert, Porcelanite, Siliceous Sinter

Clasts are smooth to touch, Easily splits into thin plates, Has High structural resistance against erosion and climate

Present

Greywacke

Available in Lots of Colors and Patterns, Generally rough to touch, Non-vesicular, Veined

Present

Types of Chert and Greywacke

Some rocks according to their use or texture are classified into different types. Know more about Chert Texture and Greywacke Texture. The types of Chert and Greywacke are .During historic times, some rocks depending on their hardness were used to create Pictographs and Petroglyphs. Rocks which are hard were generally not used. Pictographs are paintings or drawings that have been placed or created on the surface of rock. Chert and Greywacke were for creating pictographs. Petroglyph is an image which is carved into a rock. These are images created by removing part of a rock surface by incising, picking, carving or abrading, as a form of rock art. Chert and Greywacke were for creating petroglyphs.